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Hi Bob,</div>
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<br>
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Thank you for the information.</div>
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<br>
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Tyler<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Bob Miller <rmiller@jlab.org><br>
<b>Sent:</b> Monday, November 16, 2020 10:43 AM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Subject:</b> Fwd: [EXTERNAL] Re: Fwd: N2 bottle for RICH aerogel dryboxes</font>
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<p>Hi Tyler,</p>
<p>Please see Marco's response below. Based on his email, I will leave the repairs or purchase to you and I will not design an N2 system at this time.</p>
<p>Regards,</p>
<p>Bob<br>
</p>
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-------- Forwarded Message --------
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Subject: </th>
<td>[EXTERNAL] Re: Fwd: N2 bottle for RICH aerogel dryboxes</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Fri, 13 Nov 2020 13:42:22 +0100</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>Marco Mirazita <a class="x_moz-txt-link-rfc2396E" href="mailto:Marco.Mirazita@lnf.infn.it">
<Marco.Mirazita@lnf.infn.it></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td>Bob Miller <a class="x_moz-txt-link-rfc2396E" href="mailto:rmiller@jlab.org">
<rmiller@jlab.org></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">CC: </th>
<td>Marco Contalbrigo <a class="x_moz-txt-link-rfc2396E" href="mailto:mcontalb@fe.infn.it">
<mcontalb@fe.infn.it></a>, marco mirazita <a class="x_moz-txt-link-rfc2396E" href="mailto:marco.mirazita@lnf.infn.it">
<marco.mirazita@lnf.infn.it></a></td>
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<br>
Dear Bob,<br>
let me do a couple of consideration first.<br>
We have about 40 additional tiles that will be soon shipped to jlab and that should be safely stored.<br>
Then, we still plan to have the second RICH module assembled in the second half of 2021, but in the present covid situation I can't be too optimistic that this plan could be actually completed. Therefore, we must consider the possibility that we will need to
have the aerogel stored in the cabinets for very long time. In this scenario, purging the broken dry boz with nitrogen doesn't seem to me really practical.<br>
Repairing the broken one (which, from Tyler's picture look to me the INFN one, with european power unit) could also not be the best, because most likely we will need additional space for the upcoming tiles. in the past we borrowed some free space from the large
cabinet in the EEL-124, but I heard from Tyler that also this cabinet is not working.<br>
So, my suggestion would be to buy a new cabinet, with double capacity then the broken one, if possible.<br>
Alternatively, I would consider to repair the large cabinet rather then the small one.<br>
Best regards,<br>
Marco<br>
<br>
<br>
<br>
Il 2020-11-12 17:07 Bob Miller ha scritto:<br>
<blockquote type="cite">Hi Marco,<br>
<br>
Tyler reports that one of the RICH aerogel storage dryboxes failed<br>
last week.<br>
<br>
Do you want to purge the box with N2 as suggested below, or have the<br>
storage box repaired or replaced?<br>
<br>
Regards,<br>
<br>
Bob<br>
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-------- Forwarded Message --------<br>
<br>
SUBJECT:<br>
N2 bottle for RICH aerogel dryboxes<br>
<br>
DATE:<br>
Thu, 12 Nov 2020 09:37:01 -0500<br>
<br>
FROM:<br>
Tyler Lemon <a class="x_moz-txt-link-rfc2396E" href="mailto:tlemon@jlab.org"><tlemon@jlab.org></a><br>
<br>
TO:<br>
Bob Miller <a class="x_moz-txt-link-rfc2396E" href="mailto:rmiller@jlab.org"><rmiller@jlab.org></a><br>
<br>
CC:<br>
<a class="x_moz-txt-link-abbreviated" href="mailto:dsg-hallb_rich@jlab.org">dsg-hallb_rich@jlab.org</a>
<a class="x_moz-txt-link-rfc2396E" href="mailto:dsg-hallb_rich@jlab.org"><dsg-hallb_rich@jlab.org></a><br>
<br>
Hello Bob,<br>
<br>
Last week we had one of the RICH aerogel storage dryboxes fail.<br>
Fortunately, we've been able to relocate the aerogel in that drybox<br>
into the other two dryboxes. Since we're now storing aerogel at or<br>
even above full capacity of the two working dryboxes, if there's a<br>
problem with one of those, we would not have anywhere else to move the<br>
aerogel.<br>
<br>
Because of this, could you put together a system with a nitrogen<br>
bottle to be able to purge the dryboxes with nitrogen?<br>
<br>
The set up would be the same as we discussed back in October before<br>
the power outage in the EEL. I think all that would be needed is a<br>
nitrogen bottle with a regulator, relief valve, local pressure<br>
indication, rotameter, and the fittings to run a 1/4" gas line to the<br>
boxes. We already have a few feedthroughs that would be used to<br>
connect the gas line to the box.<br>
<br>
At some point we may want to add remote pressure monitoring to the<br>
set up (we don't have the sensors available right now but may in the<br>
future), so if needed, please include those in the pressure system<br>
design.<br>
<br>
If you have any questions or need any more information, let us know.<br>
<br>
Thanks,<br>
Tyler<br>
</blockquote>
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